diff --git a/requirements.txt b/requirements.txt
index b544c96c..7fd41edc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ flake8
 pylint
 requests
 tox
+pytz
diff --git a/ring_doorbell/__init__.py b/ring_doorbell/__init__.py
index 04f6e9ff..af77ab9f 100644
--- a/ring_doorbell/__init__.py
+++ b/ring_doorbell/__init__.py
@@ -2,10 +2,12 @@
 # vim:sw=4:ts=4:et:
 """Python Ring Doorbell wrapper."""
 from urllib.parse import urlencode
+from datetime import datetime
 
 import os
 import logging
 import requests
+import pytz
 
 from ring_doorbell.const import (
     API_VERSION, API_URI, DEVICES_ENDPOINT, DINGS_ENDPOINT,
@@ -158,6 +160,20 @@ def chime_attributes(self, name):
         except AttributeError:
             return NOT_FOUND
 
+    def chime_get_volume(self, name):
+        """Return if chime volume."""
+        try:
+            return self.chime_attributes(name).get('settings').get('volume')
+        except AttributeError:
+            return NOT_FOUND
+
+    def chime_firmware(self, name):
+        """Return firmware."""
+        try:
+            return self.chime_attributes(name).get('firmware_version')
+        except AttributeError:
+            return NOT_FOUND
+
     def is_chime_online(self, name):
         """Return if chime is online."""
         try:
@@ -211,6 +227,14 @@ def doorbell_id(self, name):
         except AttributeError:
             return NOT_FOUND
 
+    def doorbell_get_volume(self, name):
+        """Return volume."""
+        try:
+            return self.doorbell_attributes(name). \
+                   get('settings').get('doorbell_volume')
+        except AttributeError:
+            return NOT_FOUND
+
     def is_doorbell_online(self, name):
         """Return state for doorbell is online."""
         try:
@@ -234,7 +258,24 @@ def is_doorbell_subscribed_motions(self, name):
     def doorbell_battery_life(self, name):
         """Return doorbell battery life."""
         try:
-            return self.doorbell_attributes(name).get('battery_life')
+            value = int(self.doorbell_attributes(name).get('battery_life'))
+            if value > 100:
+                value = 100
+            return value
+        except AttributeError:
+            return NOT_FOUND
+
+    def doorbell_firmware(self, name):
+        """Return doorbell firmware."""
+        try:
+            return self.doorbell_attributes(name).get('firmware_version')
+        except AttributeError:
+            return NOT_FOUND
+
+    def doorbell_timezone(self, name):
+        """Return doorbell timezone."""
+        try:
+            return self.doorbell_attributes(name).get('time_zone')
         except AttributeError:
             return NOT_FOUND
 
@@ -261,13 +302,30 @@ def check_activity(self):
         url = API_URI + DINGS_ENDPOINT
         return self._query(url)
 
-    def history(self, limit=30):
-        """Return history."""
+    def history(self, limit=30, timezone=None):
+        """Return history with datetime objects."""
         # allow modify the items to return
         params = {'limit': str(limit)}
-
         url = API_URI + URL_HISTORY
-        return self._query(url, extra_params=params)
+
+        response = self._query(url, extra_params=params)
+
+        # convert for specific timezone
+        utc = pytz.utc
+        if timezone:
+            mytz = pytz.timezone(timezone)
+
+        for entry in response:
+            dt_at = datetime.strptime(entry['created_at'],
+                                      '%Y-%m-%dT%H:%M:%S.000Z')
+            utc_dt = datetime(dt_at.year, dt_at.month, dt_at.day, dt_at.hour,
+                              dt_at.minute, dt_at.second, tzinfo=utc)
+            if timezone:
+                tz_dt = utc_dt.astimezone(mytz)
+                entry['created_at'] = tz_dt
+            else:
+                entry['created_at'] = utc_dt
+        return response
 
     def doorbell_recording(self, recording_id):
         """Return recording in MP4 format."""
diff --git a/setup.py b/setup.py
index beb4ff90..b8187e38 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 setup(
     name='ring_doorbell',
     packages=['ring_doorbell'],
-    version='0.0.1',
+    version='0.0.2',
     description='A Python library to communicate with Ring' +
                 ' Door Bell (https://ring.com/)',
     author='Marcelo Moreira de Mello',
@@ -13,7 +13,7 @@
     url='https://github.com/tchellomello/python-ring-doorbell',
     license='LGPLv3+',
     include_package_data=True,
-    install_requires=['requests'],
+    install_requires=['requests', 'pytz'],
     keywords=[
         'ring',
         'door bell',